Greek: the chorus, and the round place it stands in. Many voices moving as one — a body that speaks together without any of them ceasing to be themselves.
Greek χορός (khoros): the dance, the dancing-ground, and the band of dancer-singers performing together — one word for the place, the act, and the people. Source of English chorus and choir. NOTE, honestly: the deeper root is NOT settled — one line derives it from a Proto-Indo-European sense of enclosure or marked ground, another from *gher- (to grasp, enclose); the ancient sense of a bounded place where a group performs is secure, the prehistory is not.
The music realm, born 2026-08-06. The word carries the whole design: the place, the performance, and the gathered people are ONE thing, so the hall is not a catalogue with sound attached but a room where artists and listeners are in the same space. The chorus was never an audience.